him before hereceivesmirandawarningis the right thing to do. a short time ago, the aclu put out a statement saying every defendant is entitled to defend miranda lights. five lawmakers want him treated as an enemy combatant. 53 people remain in boston hospitals today, three in critical condition, including a 7-year-old girl. nbc news national investigative correspondent michaels i cough is in boston, ron allen outside boston's beth israel medical center where the suspect and many of the victims are being kept and kristen we willinger at the white house, let's get to the latest on investigation. for that, we turn to michaels i cough, again, in boston. what is the fbi focusing on today and moving forward? >> reporter: federal prosecutors are focusing on drafting a criminal complaint we could see as early as this afternoon, detailing the criminal charges against him supported by an affidavit from an fbi agent that would lay out some details of the plot. not all of them but could provide crucial new information for us about what tsarnaev actually did and raise and shed some light on

whether he should be readhismirandarights.>> you're giving them the option, as to whether or not they want to cooperate and i don't believe they should have that option. this is sole will i for the purpose of interrogation to find intelligence to get the intelligence that i believe we need. >> questions remain -- did the brothers have help in carrying out their attacks? >> we're satisfied that the two actors here, the two people that were committing the damage have either been arrested or killed. and the people of the city of boston can rest comfortably at this point in time. >>> but did the fbi miss warning signs after interviewing 26-year-old tamerlan tsarnaev in 2011? where did the brothers get their guns? their training? and their inspiration? >>> in washington, the boston terror attack could become an excuse to slow down immigration reform. >> if ways to improve the bill offered amendment when we start mark-up in may and let's vote on it. i say that particularly those pointing to what happened, the terrible tragedy in boston as a -- i would say excuse for not doing th

enforcement. we know that doesn't quite work for several reasons. one, there is an exception inthemirandarights.when a suspect is read their rights by the police, we're talking about a miranda warning. there is a provision that allows in case law that allows for law enforcement to wait if they think there is a national security threat or a danger to the public until they've talked to the person and established there isn't a danger to the public or gotten the information they need. then they can read the miranda rights. that's what the fbi has done in this case. that's what they did in the new york time square bomber. that worked quite well. they talk to him for a while before they read him his rights. then they read him his rights. he kept and he provided very valuable information. we know that the traditional civilian court system founded by the founding fathers can work in this situation. >> let me ask you a couple questions. if the russian government was so concerned about tamerlan as to alert our fbi and our government, and warrant an investigation of him, why are we so sure that dz